Valve for enginery and vessels



( No Model.)

J. E. JERROLDX; C. L. BURGERMEISTER.

VALVE FOR ENGINE-BY AND VESSELS.

No. 300,373. PatentedJune 17, 1884.

lhvrrnn STATES lthrrnn'r Orrice.

JOHN E. JERROLD AND CHRISTIAN L. BURGERMEISTER, OF ALLEGHENY, ASSIGNORS OF ONE-THIRD TO THOMAS M. REES AND WILLIAM M. REES, BOTH OF PITTSBURG, PENNSYLVANIA.

VALVE F R ENGINERY AN D VESSELS.

SPECIFICATION forming part of Letters Patent No. 300,373, dated June 17, 1884:.

Application filed February 6, 1934. (X0 model.)

' scription thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Our invention has for its object the construction of a valve having its seat located within a boiler, tank, or vessel which may contain steam, air, gas, or liquid, the case of said valve being so arranged with relation to the boiler, tank, or vessel that that portion of the case projecting therefrom may be broken off without liability of the steam, air, gas, or liquid escaping.

Our invention consists in so constructing a valve and its case or shell that the valve and its scat shall be within the boiler, tank, or vessel to which it may be applied, the stem of said valve constructed in two parts, and the case or shell in one or more parts, said invention being applicable to steam, air, and water cngincry, and also to vessels for holding liquids; and said invention may be applied in distinct articles of manufacture.

To enable others skilled in the artwith which our invention is most nearly connected to make and use it, we will proceed to describe its construction and operation.

In the accompanying drawings, which form part of our specification, Figure-l is a longitudinal section of our improvement in valves for enginery and vessels. Fig. 2 is a transverse scction of the same at line A B.

In the drawings, A represents a section of a boiler with the shell of the valve secured therein, which shell consists of the parts 0 D E, securcd together through the medium of screw-threads. (Clearly shown in Fig. 1.) The valve 13 is of ordinary construction, excepting that its stem is constructed in two parts, (marked X I,) the part I having screwthreads J, which are fitted to screw-threads in the part marked K of the shell. At the junction L of the parts N and I of the stem the ends form sections of a sphere. The valve 13 is held to its seat by the pressure of steam or other force in the boiler or vessel. The stem has a- 1.1 and-wheel, H, and the shell a capping and packing piece, G.

The construction of the valve and its stem, the valve-seat, and the shell of the valve, and their application to enginery are so clearly shown in the accompanying drawings that the skilled mechanic could readily construct the-same by reference to said drawings without any further description. We will there fore briefly describe the operation and advantages of our improvement in valves.

The valve is unscated by turning the hand wheel H, which, through the medium of the screw-threads J on the part I of the stem, will cause said part at L to press against the part N at L, thereby forcing the valve-l3 off its seat, and by reversing the action of the hand-wheel the part I of the stem will be drawn back and the pressure of the steam will cause the valve B to be seated.

The advantage of the hereinbefore described construction of valve and its shell, and the application thereof to a steam-boiler or analogous use, consists in the factthat should that portion of the shell projecting from the exterior of the boiler be broken off by accident of any kind the valve 13 will remain seated and prevent the escape of steam. Such construction will therefore be of very great advantage in locomotive and other enginery, for in almost every case of accident the escaping steam results in the scalding or death of the engineer and others.

Having thus described our improvement, what we claim is The combination, with the three-part casing O D E, the former having the stem N, pro vided with the valve B and spring M, of the screw-threaded stem I, engaging the screwthreaded portion K, and passing through the parts D E, and resting on the top of the stem N, and the wheel II and packing-piece G, substantially as shown and described, and for .the purposes set forth. 

